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    • 6. 发明申请
    • Electrophotographic photosensive element and image forming device provided with it
    • 电子照相光学元件和图像形成装置
    • US20060286474A1
    • 2006-12-21
    • US10557254
    • 2004-05-12
    • Tatsuhiro MoritaShinya MimuraKatsuya Takano
    • Tatsuhiro MoritaShinya MimuraKatsuya Takano
    • G03G5/047
    • G03G5/0696
    • An electrophotographic photoreceptor which is excellent in the cleaning property and does not deteriorates the image quality for the formed images during long time use, and capable of forming images at high sensitivity, high resolution and high image quality, is provided. A photosensitive layer provided on a conductive substrate of an electrophotographic photoreceptor contains an oxotitanium phthalocyanine of a crystal form showing a diffraction peak at least at 27.3° in view of the Bragg angle 2θ in the X-ray diffraction spectrum and a surface free energy (γ) on a surface thereof is set to range from no less than 20 mN/m to no more than 35 mN/m. Such a inclusion of the oxotitanium phthalocyanine of specified crystal form enables formation of an image excellent in sensitivity and resolution and the control of a foreign matter depositing force when γ is set to an appropriate range, thus delivering a good cleaning performance.
    • 提供了一种电子照相感光体,其清洗性能优异,并且不会使长时间使用时形成的图像的图像质量劣化,并且能够以高灵敏度,高分辨率和高图像质量形成图像。 设置在电子照相感光体的导电性基板上的感光层含有X射线衍射光谱中的布拉格角2θ和至少27.3°的衍射峰的结晶形态的氧钛钛酞菁和表面自由能(γ )设定为不小于20mN / m至不大于35mN / m。 这种包含特定结晶形式的氧钛酞菁可以形成灵敏度和分辨率优异的图像,并且当γ值设定在适当的范围时控制异物沉积力,从而提供良好的清洁性能。
    • 8. 发明申请
    • Electrophotographic photoconductor
    • US20070105031A1
    • 2007-05-10
    • US11593504
    • 2006-11-07
    • Kataro FukushimaHisayuki UtsumiTomoko KanazawaKatsuya Takano
    • Kataro FukushimaHisayuki UtsumiTomoko KanazawaKatsuya Takano
    • G03G5/05
    • G03G5/0564G03G5/043G03G5/047G03G5/0614G03G5/0672G03G5/14708G03G5/14756
    • An electrophotographic photoconductor comprising a conductive substrate and at least a charge generating layer and a charge transporting layer successively layered on the substrate, wherein the charge transporting layer comprises a charge transporting material (M) and a binder resin (B) which contains, as a main component, a compound represented by the general formula (1): in which R1, R2, R3, R4, R5, R6, R7 and R8, may be the same or different each other and each independently denote a hydrogen atom, a halogen atom, or a substituted or unsubstituted C1 to C6 alkyl group; and R9 and R10 may be the same or different each other and each independently denote a hydrogen atom, a halogen atom, a substituted or unsubstituted C1 to C6 alkyl group, a saturated cyclic C4 to C10 hydrocarbyl group, or a substituted or unsubstituted aryl group; and n denotes an integer: and further has a layered structure composed of a plurality of said charge transporting layers wherein the outermost layer of the said charge transporting layers show 50% or higher elastic power (ηHU) measured in the surface coating hardness test by applying a highest pushing load of 5 mN to the surface layer at ambient temperature of 25° C. and at 50% relative humidity and hardness (Hplast) of plastic deformation in a range from 220 N/mm2 or higher to 275 N/mm2 or lower. The ratio M/B by weight of the charge transporting material (M) of the outermost layer and the binder resin (B) is controlled to be preferably 30/70 or lower and more preferably in a range from 7/93 or higher and 20/80 or lower and a preferable enamine type charge transporting material (2) is added to obtain an electrophotographic photoconductor excellent in printing durability and high photo-response.